TREA

where the collecting or depositing means including helical conveying means

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Industry

  • CPC
  • E21B27/04
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21BEARTH DRILLING E21B27/00Containers for collecting or depositing substances in boreholes or wells

Current Industry

E21B27/04where the collecting or depositing means including helical conveying means
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